Transmitter for selective or printing telegraphs



c. L. AND H. L. KRufi. J TRANSMITTER FOR SELECTIVE 0R PRINTINGTELEGRAPHS; APPLICATION FILED JAN. 21. [921.

1,419,677, PatentedJune 13, 1922.

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C. L. AND H. L. KRUM. TRANSMITTER FOR SELECTIVE OR PRINTING TELEGRAPHS.APPLICATION FILED JAN. 21. I921. 1,1, 77, Patented June-13, 1922..

3 SHEETS-SHEET 2.

. C. L. AND H. L. KRUM.

TRANSMITTER FOR SELECTIVE 0R PRINTING TELEGRAPHS.

APPLICATION FILED JAN. 21, 1921.

1,419,677. Patented June 13, 1922.

jnverzfors STATES cnannns L. anon AND HowAnn-a. KRUM, or 'cHIcAoiLLmoIs, nssronons r .moaxnum COMPANY, or onrcaeo, rumors, acoaroanrron.

. rnnnsmrrrnn vnon SELECTIVE onrnmrme'rmomrns.

a mm man Patented June 13,1922. I

Original application filed May 17, 1915, Serial-1T0. 28,699. Patentlt'o.1,366,812, dated January 25, 1921'.

' Divided and thisv application filed January 21, 1921. Serial No.438,809.

To all whom it may concern:

Be it known,that we, CHAR'L'ns' L. KRUM and'HowARn L. KRUM, citizensof-the United States, and residents of Chicago, county of Cook, andStatev of Illinois, have invented certain new and useful Improvements inTransmitters for Selective or Printing Teleclear, and exact description.v

.. Thepresent application is. a division of an application filed by usin the United States Patent Office May 17,1915, Serial No.28,699,-

graphs, ofwhich the following is 'a full,

issued January 25, 1921, asPatent No. 1,366,-

The invention relates to selective orprinting telegraphs in whichthecharacters or signa s are represented by combinations of impulses, andin which the transmission of the signals or combinations of impulses iscontrolled by the formation of a tape. ,7

The present invention seeks to provide means, whereby the tape, can befed directly from the tape former or punching machine to" thetransmitter, together with means whereby any cessation of the operationof the tape former or punching machine will automatically interrupt thtransmission of signals and the tape feeding means of the transmitterand whereby the renewed operation of-the tape former or punching machinewill automatically throw the transmitter ,intooperation; Further objectsof the inventioniajlt to pi'ovide interrupting means .Whicl'l Will actonly between completed sig nals, to provide an improved transmittinginstrument having tape controlled means for stopping and starting thetape feeder and the transmission of signals. The invention consistsinthe features of improvement hereinafter set forth, illustratedr-i'r'i.-the, preferred form'and arrangement in the accompanying drawings andmore particularly pointed out in the appended claims.

In the drawings, 1 is a view in ele- ,vation of the improvedstationinstruments.

Fig. 2 is an'elevation of the right hand end of the instrument shown inFig. 1. Fig. 3 is 'asection on the line 3-3 of Fig. 1. Fig. 4 is.a-horizontal section on the line. 44 of Fig. 2. Fig. 5 is a diagrammaticview illustrating the arrangement of the tape-forming .or punchingmechanism and the transmitter.

Fig. 6.is aview. ofa short section of the tape.

Any suitable mechanism. for forming or punching the tape may "be?employed, and can be actuated by a receiverjmechanism under control ofsignals transmitted from a distant station, or, as usual; by. a' set offinger g mechanism similar to keys. A --punc. that set forth-incurLetters Patent of the United 'States No, 1,182,179, dated, May 9, p1916, isdiagrammatically illustrated inrFig.

5. The tape Ais fed through a passage or ie-block '11. The die-block 11is provided with punches'12 for embossing, or preferably perforating thetape to form transverse rows of holes c, the perforations in theseparate rows being varied so that each row repre-' The sents.lafdifierent character or. signal. tape form1ng mechanlsm' is alsoprov1ded with a punch for forming a longitudinal row' I perforations 13,which are adapted to be engaged by pin-toothed feed wheels to .of smaadvance the tape. v

-A pivoted spring-held punch actuator 14 uideway formed bet-ween a plate10 and a i's'connected by a rod 15 to the armature b of a magnetB andthe punches '12 which form the transverse rows of perforations,arecontrolled by a-set of selecting bars 16, which are connected, to theactuator 14 to shiftable, so :that their ends can be shifted into andout of line with the punches 12.

The selecting bars 16 are actuated by a set ranged in vertical series,as set forth in the above noted .patent.

A set of finger keys 20 (only two of which are shown) have lugs 21 forengaging and variably actuating the bails. Each key operates theoutermost bail,'which shifts an arm 22 carrying an insulated switch arm23 Thus, when a key is actuated, one or .more of the selecting bars 16are shifted and a circuit is closed from a battery wire 24 to the switcharm 23, thence from the conswing therewith, but are longitudinally.

tact of this switch by a conductor 23' through magnet B to ground, andthe magnet is energized to shift the actuator 14- and operatethepunches. The actuator also advances the tape through the Qmchmechanism intermittently or step-by-step by means of a spring-held pawl25 mounted therein and arranged to engage the teeth, of a ratchet 26.The ratchet is connected to a pintoothed feed wheel 27., which engagesthe longitudinal row of perforations of the tape and on the backwardmovement of the actuator, the ratchet and feed wheel 27 are advanced onesten by the pawl. A pressure roll 28 is arranged to hold the tape insnug engagement with the feed wheel 27 and the tape passes therefromover a guide plate 29.

As the tape is formed and intermittently advanced by the punchmechanism, it is fed directly to the transmitter having a tape feeder,which, in the form shown, comprises a horizontal feed wheel 30arranged-at one end of a base plate 31. The feed wheel is.

arranged behind and projects through a slot in an upright plate 32, sothat its teeth extend into a tape guide-way formed between the plate 32and a narrow, thin plate 33, as most clearly shown in Fig. 4. The teethof the wheel 30 engage the longitudinal row of perforations 13 of thetape and advance the same through the guide-way so that the transverserows of perforations a thereof co-operate with a vertical series ofselecting switches C.

The switches C extend through a series of eccentrics 34 on an uprightshaft 35, the

' series of springs 40 tend to hold the switches latter being fixed atits lower end to a small base plate 36 which is insulated from the mainbase plate 31. The inner, pointed ends of the switches project intothetape guideway between the plates 32 and 33 and their outer portionsextend through a guiding comb bar 37 and are provided with contacts thatco-operate with a series of insulated contact screws 38 on an uprightplate 39. A

inengagement with the contact screws, but

as the tape engages the inner, pointed ends.

of the switches,each switch is held out of engagement with its contactscrew unless it drops into one of the perforations of the tape. SwitchesC are thus variably actuated to select the combination's'of impulses asthe tape is advanced by the feed wheel 30. As the tape leaves the wheel30, it is deflected forwardly by a guide plate 41.

Feed wheel 30 is mounted upon the lower end of a shaft 42 journaled in asleeve 43 that depends from a support or head 44 swiveled upon one endof a horizontal shaft 45'. A worm 46 and a worm wheel 47 are arrangedwithin a recess in the support or head 44 and are fixed respectively tothe shafts 45 and 42 to form a driving connection between shaft 45 andfeed wheel 30. Sleeve 43 has a finger-piece 48 for swinging the support44 and parts carried thereby through a short are and move the feed wheel30 out of the path of the tape, and this oscillating movement of thesupport 44, is

guided by a U-shaped guide bracket 49 (see Figs. 2 and 4) that projectsrearwardly from the plate 32 and engages flattened faces on the lowerend of the sleeve 43. A spring 50 extends between the bracket 49 and thefinger 48 and holds the parts .in the normal position shown in Fig. 2,with a lug '51 on the sleeve 43 engaging an adjustable stop screw 52. Aninsulated arm 53, connected to the. head 44 and extending downwardlytherefrom, engages the forked outer end of a lever 54. The inner end ofthis lever car ries a vertical pin 55 (see Fig. 4) which, when thesupport 44 is shifted, engages and shifts the switches C out of the pathof the tape. A similar arrangement of tape feeder and tape-controlledselecting switches is set forth and claimed in Krum and Krum U. S.Letters Patent, No. 1,360,231, dated November 23, 1920.

As set forth in said patent and in the prior application, Serial No.28,699of which the present application is a division the combinations ofimpulses selected by the tape controlled switches are imparted to theline by a rotary or sun-flower switch mechanism comprising, in thepresent construction, the rotary switch arm e arranged to move over aseries of contacts 1, 2, 3, 4, 5

and 6 mounted upon a disk E (see Figs 1 and 5) ,also as set forth insaid patent and application, the feed wheel is preferablycontinuouslydriven when in operation during the transmission of messagesto continuously ad vance the tape. In accordance with the presentinvention, means is provided for stopping and starting the transmissionof signals and the feed of the tape. For this purpose and since thepresent instrument is adapted for use with systems which do not require.the transmission at regular intervals of s nchronizing or correctingimpulses: whether or not character signals are also transmitted, thesun-flower switch arm 6 is mounted on the shaft 45, which drives thetape feed whee-l, and this shaft is connected toa motor by a clutchwhich is controlled by the operation of the tape-forming or punchingmechanism.

As shown in Figs. 1 and 2, the shaft 45 is journaled at the outer end ofcross-piece- 56, which extends across a circular opening in the upperportion of a vertical bracket 57 on the base plate 31 and extendsthrough the circular opening of a similar bracket 60. The opposite endof the shaft, as shown in dotted lines in Fig. 1, extends within a boreformed within an aligned shaft 58. The latter is journaled in the upperend of a U- shaped bracket 61 (see Figs. 1 and 3). The left-hand end ofthe shaft 58 is provided with a gear 62 which meshes with the teeth of apinion 63 on the shaft of a small electric motor 64, so that the shaft58 is continuously driven during the-operation of the are preferablyrepresented by permutations and, to

of five impulses of'opposite polarity, h

this end, switches 9 form pole changers,

front and back contacts of whichare con-' nected by conductors 87 and 88to the opposite sides of a divided battery H. ductor 87 also extends tothecontact 6 of the transmitter disk E. As transmitter switch 0 passes'over contacts 1, 2, 3, 4 and 5, permutationsof positive and negativeimpulses varied in accordance with the ope-ration of thetape-controlling switches C and repre-.

senting the different character signals are imparted to the line. Asswitch 6 passes over contact 6, a negative restoring and printingimpulse is transmitted.-

The transmitter switch arm 0 is fixed to an insulated hub 99 on shaft 45and carries a brush\100 which engages the contacts of the transmitterdisk E and is preferably provided with a piece of felt 101 for rethispurpose,

moving dust from the contacts. Hub 99 is engaged by an insulated brush102 mounted on a block 90. The latter .is pivoted on bracket 91 and is,spring pressed to hold the brush against the hub.

The form of instrument shown is designed for a stat1on, such as anews-dis- -tributing point,- from which messages are transmitted to anumber of receiving staions.- Such an instrument preferably has meansfor controlling a home recorder. For

' upon theupper annular portion of bracket 57, and a co-operating arm mis mounted on shaft 45. The home recording disk M and switch arm m aresimilar in constructionand arrangement to the transmitting disk andswitch arm, .the disk having corto battery wire 24 and operated by amagnet R The coil of magnet R is connected by a conductor 104' to thecontact of the normallycopen switch 1). Brush 1020f the transmitterswitch arm is connected by. a conductor106, to the coils of a polarizedrelay Swhose tongue 8 local battery wire 24., The contact-of thisswitchv tongue is connected by a conductor 107 to the brush 108 of therecording switch arm m. Asswitches C are variably operated by the tape,pole changing magnets U: are variably energized and, by means of thepole changers g and the conductors'86, 87 and88, the contacts 1, 2, 3, 4and 5 of the transmitter disk E are variably connected either to thepositive or the negative pole a contact disk M is mounted" applicationabove referred to,

is connected to the of the divided battery H. As the connected switcharmse and m pass over their contacts in synchronism, these positive andnegative impulses pass through relays and its tongue 8 is vibrated toconnect and disconnect switch arm m to and from batter and therebyvariably operate the magnets When one of the magnets N is energized, thecorresponding switch a closes a circuit from battery wire 24 throughlocking switch coil of the corresponding magnet N, so that the selectedmagnets remain-energized until switch arm m passes over its contact 6.At this time, the transmitter switch arm e 7 s .4", conductor 105,shifted switch at, and the passes over its contact 6 and a negativeimpulse through the relay S connects switch arm m to battery and closesa. circuit through the magnetP. This magnet quickly shifts its switch pto close the circuit (Sf magnet R, and the latter opens the unlockingswitch 1' and restores the set of magnets N. The latter can of course beemployed for operating a suitable printer 'to record the transmittedmessages. Brush 102 of the transmitter switch 6 may be connected, ifdesired,- directly to the line, but it preferably extends through thecoils of a polarized transmitting relay X, having a switchv tongue mconnected to a line conductor 131 and contacts are connected byconductors 130 to the positive and negative poles of a divided linebattery H".

Briefly stated, the operation. of the pre-.

ferred construction shown is as follows. The tape is formed undercontrol of fingerkeys 20 and punch-actuating magnet B, and is advancedby the intermittently operating feed wheel 27 of the tape former. Thencethe tape passes around pin 81 of switch F and through the guide-waybetween the plates 32 and 33 of the transmitter. Here it is engaged bythe feed wheel 30 and moves past the switches C. When the shafts 15 and58 are connected by the clutchmembers, the transmitter switch 6 and thefeed wheelBO are continuously rotated in definite timed relation, thegearing being such that as the switch rotates through a singlerevolution, the tape is advanced a space equal to the distance betweenadjacent transverse rows of.

perforations.

the set of As set forth in the patent and switches C are preferablyarranged at right to of the transmitter disk to the opposite lay X, eachcharacter signal being followed by negative restoring impulse. If a homerecorder is employed, the transmitted impulses pass through relay S andopen and close the local circuit through the home, rc-

cording switch m, which, as described, variably operates a set ofmagnets N. and a suitable printing mechanism controlled thereby.

Contact 76 of the tape actuating'switch F is connected to the local.battery and contact 77 is connected by a conductor 138 to the coil ofclutch controlling. magnet D. Normally, these contacts are engaged andthe magnet energized to hold trip pin 73 in inoperative position. If theoperation of the tape former is interrupted, the tension of the tapeshifts switch F, opens the circuit of magnet D and the trip pin isprojected into the path of clutch member 67. The latter, after thecharacter signal then being transmitted to the line is completed, isdisengaged and.the operation of the transmitting switch 6 and tapefeeder 30 and also of the home-recorder, if one is employed, isarrested. As soon as the operation of the tape former relieves thetension of the tape and permits the closing of switch Fto energizemagnet D and withdraw trip pin 73, the clutch members will again connectthe shafts 45 and 58 to continue the feed of the tape and thetransmission of the character signals.

Obviously, changes may be made in the details set forth withoutdeparture from the essentials of'the invention as defined in the claims.

We claim as our invention:

1. In selective telegraphs in which the signals are represented bycombinations of impulses, the combination ofa set of tape controlledimpulse selectors, a switch mechanism cooperating therewith to impartthe selected impulses to the line, means for feeding the tape in timedrelation to the operation of said switch mechanism, a tape former, andmeans controlled by the tape former and operable to automatically stopsaid switch mechanism and said tape feeding means only between completedsignals.

2. In selective telegraphs in which the signalsare represented bycombinations of impulses, the combination of a set of tape-controlledimpulse selectors, a switch mechanism cooperating therewith to impartthe selected impulses to the line, means for feeding the tape in timedrelation to the operation of sa1d switch mechanism, a tape former, andmeans controlled by the tape former and operable to automatically stopand start said switch mechanism and said tape feeding means only betweencompleted signals.

3. In selectivetelegraphs in which thesig nals are of uniform length andrepresented by combinations of impulses, the combination of a set oftape-controlled impulse selectors, a rotary member cooperating therewithto impart the selected impulses to the line, a tape feeder operating intimed relat on with said rotary member, a tape former,

and means under the joint control of said tapeformer and feeder forautomatically arresting said rotary member and said tape feeder.

- 4. In selective telegraphs in which the signals are of uniform lengthand represented 'by combinations of impulses, the combination of a setof tape-controlled impulse selectors, a rotary member cooperating therewith to impart the selected impulses to the line, a tape feederoperating in timed relation with said rotary member, a tape former, andmeans under the joint control of said tape former and feeder forautomatically stopplng and starting said rotary member and said tapefeeder.

5. In selective telegraphs in which the signals are represented bycombinations of impulses, the combination with a set of tape controlledimpulse selectors, a rotary switch mechansm cooperating therewith toimpart the selected impulses to the line,,means for feeding the tape intimed relation with the operation of said switch mechanism, a tapeformer, and means for automatically arresting and initiating themovement of said rotary switch mechanism and said tape feeding meanscomprising a stop-and-start clutch and a releasing trip thereforcontrolled by said tape former and adapted to cooperate wilth saidclutch only between completed signa s.

' 6. In selective telegraphs in which the signals are represented bycpmbinations of impulses, the combination with a set of tapecontrolledimpulse selectors, a rotary switch mechanism cooperating therewith toimpart the selected impulses to the line, a tape feed wh'eel operated intimed relation with said switch mechanism, a clutch and 'a cooperatingtrip operable only between completed signals to stop and start saidrotary switch mechanism and said tape feed wheel, a tape former, andmeans controlled thereby for completed signals to arrest switchmechanism and said tape-feeder, a tape former, and a controlling switchfor said magnet controlled by the'movementof the tape between saidformer and said feeder. p

8, In selective telegraphs in which the signals'are represented bycombinations of impulses, 'the'combination" with a setoftapecont'r'olled impulse selectors, a rotary switch mechanismcooperating therewith to impart the selected impulses to the line, atape feeder operated in timed relation with said switchmechanism, a stopand start clutch for said rotary switch mechanism and said tape feeder,a controlling trip for said clutch, a tape former, and means controlledthereby for operating said trip.

9. In selective telegraphs in which the signalsare represented bycombinations of impulses, the combination with a set of tapecontrolledimpulse selectors, a rotary switchsaid rotary the selected impulses tothe line, a tape.

feeder operated in timed relation with said switch mechanism, a stop andstart clutch for said rotary switch mechanism and said tape feeder, acontrolling trip for said clutch, a tape former, and an electro-magnetcontrolled thereby for operating said trip.

10. In selective'telegraphs, a transmitter comprising a set oftape-controlled impulse selectors, a rotary switch mechanism forimparting the selected impulses to the line, a feed-wheel for the tape,a common drive shaft for operating said switch mechanism and said feedwheel in-timed relation, a stopand-start clutch for said shaft, a tripeffective only between completed signals for controlling saidclutch, atape former, and means under the joint control of said tape former andsaid feed wheel for operating said trip.

CHARLES L. KRUM.

HOWARD L. KRUM.

